these are the hooks which thank_you mod use :

cache_templates
userdata_delete
showpost_complete
showthread_complete
template_groups
threaddata_delete
postdata_delete
postbit_display_start
postbit_display_complete
global_setup_complete
member_profileblock_fetch_unwrapped
userdata_update_username

in which one shall i put in the $validvariables my fields ?

and again ,
where my table ive created for this goes in all this story ?

thanks,

It seems to me that perhaps your first mod should have been a bit easier. This isn't going to be an easy one and I can't give you all the answers here. All I can do it point you in the general direction.

You need to add all your variables to the $validfields array. I believe I said to do that in threaddata_start and I think I gave an example on that last page.

After that, you need to 'set' that fields after you have the data (from your form) and before they are saved. I can't tell you want hook location to use - you will have to find that by seeing which hooks are available and reading the code to see which is positioned where you want it.