Hi All!!!
Thank you so much, guys, it is useful to know all the possible ways, and more than i need. What i was looking for in the beginning is the solution suggested by demiller9
with !define MUI_COMPONENTSPAGE_SMALLDESC
I tried that myself before, but it didn't work because i placed after the pages instead of before. Now that it works i can see the difference from the solution i got by hacking the resources:
This turns out a better solution in my situation than using MUI_COMPONENTSPAGE_SMALLDESC because first of all i got no need for a description, and it feels important to see all items when expanded in the tree list. The one with MUI_COMPONENTSPAGE_SMALLDESC provides a smaller control that has vertical scroll bars in my case, and just for that reason i went for the hacked version.
Again, thank you everybody!!!!