Module development and code questions

Picked up on a post that another user (cinquetooty) had a modified WorldPay module that worked with SECPay. I contacted him and he gratefully supplied the modified module. I had problems installing it, realised that I needed secpay.info file for it to be listed and after successfully getting it listed and enabled I found there to be no settings page. It was then that I found that it had been set up for 4.7

So now I'm back to the start although I know that the WorldPay module can be modified to support SECPay.

Is it possible to modify the module code so that i can customize according to my need?
if so how is it done?

regards,
naveen

Is it possible to integrate social text or twiki with drupal?
i have downloaded both these wikis but unable to configure properly twiki and for social text it works only with post GRE sql where as i am using my apache with mysql.

Thanks
Naveen

Is there any module where in search in attachments are possible.
for keyword search in .pdf, .txt etc

Thanks,
Naveen

It is so hard to deal with locale module. I have great deal of translation file .po for drupal 4.7, and now i've got to translate all over again for drupal 5.x ??

Of course i can import the .po from 4.7, but in that translation file there are LOTS of unnecessary strings, which do not appear un current project. So, WHY there is no option "Update existing strings and DO NOT add new ones" ???? Is it really so hard to put something like that? I tried to make a hack in locale.inc, but no luck, it still imports string no matter what..

Hello,
I've tried the multistep form guide (http://drupal.org/node/101707 and the various other posts on the subject but I'm still stuck, badly, on this.

I think it's down to $form_values not being passed back correctly.

What I'm trying to do:
1) create a form containing a list of questions (this is ok)
2) form submits & validates, a score is calculated dependent on answers (this is ok)
2a) A save button is shown to save this score.