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If this is the hack I'm thinking, try this:
There is small problem - the name of one directory is not corect, so you need to fix it for yourself. Unzip the file and rename "html\modules\system\admin\blockadmin" to "html\modules\system\admin\blocksadmin"
Make a backup of your XOOPS instalation!(or try it first on non production site)
Upload the content of html folder to your sites root folder.
Unzip and upload theme "blocks" (from second zip file) and make it selectable or default theme from admin.