Module development and code questions

Hello my fellow Drupalers ;)

I recently figoured out how to display an image attached to the article (thanks to this topic: http://drupal.org/node/63114#comment-136051). Yet I'd love to have a function to scale the image down a bit without invoking too much unneeded stuff (in other words - I don't want to play around with image module ;) ). Would anyone be so kind to paste me a piece of code that would create attachments' thumbnails? Is it a lot of work? Maybe there already is such a function?

Hello all,

Pretty new with drupal so be patient with me :)
Im trying to create an eshop with inkjet cartridges and so far i am using e-commerce, CCK, views and few more modules.
The problem is that my products have compatibility issues so i need to link each one with a number of items from a huge list.
To be more specif: each ink is compatible with a number of printers.
I am not sure how to implement this.
Using CCK custom field value list seems too much for 500+ printer models.
Creating terms for each model...also dont sound good.

I have RSS enabled, and basically working, but there a few things I need to know.

1) To get the feed to auto-update, I guess I have to do something with cron, but what? I know how to use cron, but what do I put in the cron file to update the RSS? I am using shared hosting (dot5hosting.com).

2) Can I edit the individual links? For example, I have 3 links in a row that reference the same story, can I delete one of them? Also, can I put small comments into a link - like PJ does on groklaw.net? Can I add a link that isn't already there?

Hi,

I am creating a set of modules around some core framework

module
module -> optionalmodule1
module -> optionalmodule2
module -> optionalmodule3

How can I generate data in the optional modules for example $form['modulename'] and use that data in the core module?

I don't want the "core" module to have to know about the optional ones.

Example.

optionalmodule1_function returns $data[1]
optionalmodule2_function returns $data[2]
optionalmodule3_function returns $data[3]

HI,

I am currently working on 4.7.x with the PROTX payment module and I am trying to add some new features, such as re-displaying the credit card input form if the transaction fails. I have created a URL, protx/failed, which executes (I have set my VSPDirect simulator to REJECTED for now) as expected but when I try again it tells me that the transaction ID cannot be used.

Thus my question, after much code trawling...

I'd like to create a vendor directory listing, which module(s) would I use to create this?