My site is WSS 3.0 built in 2009. Now I got a high performance server and I want to move my site to that server.

I have installed several dlls into the windows /assembly folder in my old box and have used SharePoint desinger to edit my homepage in my old box. 

1. I used `stsadm -backup` to back up my site.
2. I installed WSS 3.0 on the new server and it did run.
3. I used `stsadm -restore` to restore my site but it failed many times .
4. Becasue I can't obtain `gacutil.exe`, I didn't import my dlls into the new server.

Can you help me out?

Thank you!