>So I need help in two areas: 1) copying the vcx 2) is it safe to change the scx. Do I have to worry about spaces, carriage returns etc. if I do itmanually ? would it be safe to, for example, replace all classloc with 'surveycls2' for classloc='surveycls' ?

I've done it many times. You may need to include the .vcx extension, make sure no trailing spaces are there, and that'd be it. Safest way is to

replace classlib with strtran(classlib,'oldlibname','newlibname')

so you keep the extension, paths etc. Remember to recompile the form ("compile form yourform" in 6.0 and "compile class yourform.scx" in 5). Backup first, i.e. work on a copy of your form, with the copy of the classlib.

As for copying the vcx, I'm usually not taking the whole vcx, but rather

add class [classname] of oldlib to newlib

.