move your ENTIRE interface folder where ever you want it.
then open wowuides.exe.config in a suitable editor
find and change
Code:
<setting name="WoWPathOverride" serializeAs="String">
<value />
</setting>
to
Code:
<setting name="WoWPathOverride" serializeAs="String">
<value>root of where ever you put interface</value>
</setting>
by root, i mean if you copied it to c:\
that is root
where as desktop would be
c:\Documents and Settings\{username}\Desktop\
you can noiw go back into the wow folder and get rid of all the custom ui kit crap