[QST- HELP] Can't see themes anymore!!

Hi, i installed a theme from a package (130 GREAT!!! TKS) !!!
But I'd like to change some icones from the theme. i created a folder "icones" at the root on the phone. I use M8sprite (great) but i cannot see icons i installed ( i installed ".ico") when I want to change the icone with the path mentionned in M8Sprite.

- So please tell me where to install icons. (it sems they must be 96x96) ?
- Perhaps ".ico" are not allowed ???

please help ...Tks
and thanks to all and this big big FORUM MEIZUME !!!!
nicojoy69