K, I got xdesktop from loose-scews.com and I don't know what to do now. The installation in the readme doesnt explain enough.
---readme---
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xDesktop v1.2
by Andymon
andymon@ls-universe.info
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Overview
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This simulation of the explorer desktop is up to 95% identical to Explorer Desktop! Just
set the following Three Lines and you're having your OldStyle Explorer Desktop =)

xDesktopAutoCreate
xDesktopConfigFile "$ConfigDir$yourdesktopfile.rc"
include "$ConfigDir$yourdesktopfile.rc"

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Basic Settings Overview:
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Of course, you should also specify some basic layout informations.

xDesktopX
xDesktopY
xDesktopItemWidth
xDesktopItemHeight
xDesktopSpacingX
xDesktopSpacingY
xDesktopDirection
xDesktopWrapDirection
xDesktopWrapCount

These settings affect only the "!xDesktopCreate replace ..." Bang and "xDesktopAutoCreate"
to provide a instant layout ;) The further finetune positioning should be made by hand (Draggable).