[Q]A little help for porting ROM

Hello everyone

I want to port MIUI from K-Touch Touch 2 device to my Archos 45 Hélium 4G ( they are clones )
I followed this guide : http://forum.xda-developers.com/show....php?t=1908008 but i get stucked when i have to edit the Updater-Script :

- There's no set_perm
- Do i have to just remplace the file or edit it ? this is the same phone because as i said they're clones, so can't I just replace file ?

Thanks