jQuery is XOOPS compatible if you follow these tips.

You can use jQuery library in your XOOPS theme, as usual, but if you just follow jQuery's official documentation, you won't be able to run it properly in all browsers.

There's an incompatibility between jQuery and XOOPS own javascript code, but it can be overriden.

In your theme's style.css, replace the default CSS styles for div.xoopsCode and div.xoopsQuote with the following.

You may have noticed some Xoops users are using multiple themes on their sites. The themechanger module by suin will help you change themes per modules. This tutorial provides a different and simpler way of changing themes.

The best way of illustrating it is by showing an example. The following steps are what we did for our site.

One limiting factor of Xoops system is the fixed display of blocks. Once you have used up Left, Right, CenterCenter, CenterRight, CenterLeft blocks, you will not be able to use any other blocks unless you manually pull information and display on your web site.

It is not too difficult to replace the BlockTitle text with an image. You will need to make changes to the theme file and each individual block.