diff --git a/prestartup_script.py b/prestartup_script.py
index 5f9d6615..6d0c303a 100644
--- a/prestartup_script.py
+++ b/prestartup_script.py
@@ -2,99 +2,39 @@
 
 from pathlib import Path
 from comfy_env import setup_env, copy_files
+from comfy_3d_viewers import copy_viewer
 
 setup_env()
 
 SCRIPT_DIR = Path(__file__).resolve().parent
 COMFYUI_DIR = SCRIPT_DIR.parent.parent
 
-# Copy 3D viewer files from comfy-3d-viewers package
-try:
-    from comfy_3d_viewers import (
-        get_js_dir, get_html_dir, get_utils_dir, get_nodes_dir, get_assets_dir
-    )
-    import shutil
+# Copy viewers (GeometryPack uses many viewer types)
+viewers = [
+    "viewer", "vtk", "vtk_textured", "multi", "dual", "dual_slider",
+    "dual_textured", "uv", "pbr", "gaussian", "bvh", "fbx_animation",
+    "compare_smpl_bvh", "cad_analysis", "cad_curve", "cad_edge",
+    "cad_edge_detail", "cad_edge_vtk", "cad_hierarchy", "cad_occ",
+    "cad_roi", "cad_spline",
+]
+for viewer in viewers:
+    try:
+        copy_viewer(viewer, SCRIPT_DIR / "web")
+    except Exception:
+        pass  # Skip unavailable viewers
 
-    web_dir = SCRIPT_DIR / "web"
-    web_js_dir = web_dir / "js"
-    web_js_dir.mkdir(parents=True, exist_ok=True)
-
-    # HTML files GeometryPack actually uses (NOT fbx viewer variants)
-    html_files = [
-        "viewer.html", "viewer_vtk.html", "viewer_vtk_textured.html",
-        "viewer_multi.html", "viewer_dual.html", "viewer_dual_slider.html",
-        "viewer_dual_textured.html", "viewer_uv.html", "viewer_pbr.html",
-        "viewer_gaussian.html", "viewer_bvh.html", "viewer_fbx_animation.html",
-        "viewer_compare_smpl_bvh.html",
-        "viewer_cad_analysis.html", "viewer_cad_curve.html", "viewer_cad_edge.html",
-        "viewer_cad_edge_detail.html", "viewer_cad_edge_vtk.html",
-        "viewer_cad_hierarchy.html", "viewer_cad_occ.html", "viewer_cad_roi.html",
-        "viewer_cad_spline.html",
-    ]
-    html_dir = Path(get_html_dir())
-    for name in html_files:
-        src = html_dir / name
-        if src.exists():
-            dst = web_dir / name
-            if not dst.exists() or src.stat().st_mtime > dst.stat().st_mtime:
-                shutil.copy2(src, dst)
-
-    # JS bundles (vtk-gltf.js, gsplat-bundle.js, viewer-bundle.js)
-    js_dir = Path(get_js_dir())
-    for f in js_dir.glob("*.js"):
-        if f.is_file():
-            dst = web_js_dir / f.name
-            if not dst.exists() or f.stat().st_mtime > dst.stat().st_mtime:
-                shutil.copy2(f, dst)
-
-    # Utils and viewer subdirectories
-    for subdir in ["utils", "viewer"]:
-        src_dir = js_dir / subdir
-        if src_dir.exists():
-            dst_dir = web_js_dir / subdir
-            dst_dir.mkdir(exist_ok=True)
-            for f in src_dir.rglob("*"):
-                if f.is_file() and f.suffix in (".js", ".css"):
-                    rel = f.relative_to(src_dir)
-                    dst = dst_dir / rel
-                    dst.parent.mkdir(parents=True, exist_ok=True)
-                    if not dst.exists() or f.stat().st_mtime > dst.stat().st_mtime:
-                        shutil.copy2(f, dst)
-
-    # Node widgets (skip FBX-specific ones GeometryPack doesn't use)
-    skip = {"mesh_preview_fbx.js", "debug_skeleton_widget.js", "compare_skeleton_widget.js"}
-    nodes_dir = Path(get_nodes_dir())
-    for f in nodes_dir.glob("*.js"):
-        if f.name not in skip:
-            dst = web_js_dir / f.name
-            if not dst.exists() or f.stat().st_mtime > dst.stat().st_mtime:
-                shutil.copy2(f, dst)
-
-    # Assets (HDR environments)
-    assets_dir = Path(get_assets_dir())
-    if assets_dir.exists():
-        dst_assets = web_dir / "assets"
-        dst_assets.mkdir(exist_ok=True)
-        for f in assets_dir.iterdir():
-            if f.is_file():
-                dst = dst_assets / f.name
-                if not dst.exists() or f.stat().st_mtime > dst.stat().st_mtime:
-                    shutil.copy2(f, dst)
-
-except ImportError:
-    print("[GeometryPack] comfy-3d-viewers not installed")
-
-# Copy dynamic widgets JS
+# Copy dynamic widgets
 try:
     from comfy_dynamic_widgets import get_js_path
     import shutil
     src = Path(get_js_path())
     if src.exists():
         dst = SCRIPT_DIR / "web" / "js" / "dynamic_widgets.js"
+        dst.parent.mkdir(parents=True, exist_ok=True)
         if not dst.exists() or src.stat().st_mtime > dst.stat().st_mtime:
             shutil.copy2(src, dst)
 except ImportError:
     pass
 
-# Copy example assets to input/3d
+# Copy assets
 copy_files(SCRIPT_DIR / "assets", COMFYUI_DIR / "input" / "3d", "**/*")