like chappy said, cab files are easy....try reading up 1st..on registry tweaks, customizations(s2u2, taskbar, etc)...u'll prolly get intrigued into unlocking and flashing...but for starters
of course, guys feel free to add to list)
-resco file explorer 2008
-total commander
honestly..lol..like chappy said what exactly are u tryna do with ur fone???