knuckles84 Wrote:the problem aren't only the homebrew but, everthing like the plugins

In this context, custom made (unsigned) plugins _are_ homebrew.

knuckles84 Wrote:this is not a realy big work but it takes time.

Uhh, if it takes time, isn't it a big job then?

knuckles84 Wrote:there must be an other solution that the 1.5 kernel can read more than 2gb!!!

(I really have limited knowledge on PSP kernels and stuff, so most of this will be speculation)
Depends.  If the 1.50 kernel was designed with memsticks larger than 4GB in mind (Sony would have considered it I guess) then it may not be too hard, provided the kernel can be edited (which may not be the case).
If the 1.50 kernel wasn't designed with >4GB memsticks, then it's definitely not an easy task.