How to and from where install ClockworkMod Recovery (CWM) on GT-P1000?

Currently I am trying to upgrade my Android OS from 2.3.3 to Cyanogenmod 9 not with "Odin" but via the bootloader and SD-card. Now I had a problem with "Signature verification failed" described here which is highly likely due to the fact that I failed to install a custom bootloader. Now as it is mentioned everywhere **as a pre-requisite**, I want to install "ClockworkMod Recovery", but I cannot find it anywhere! More so in articles around the www from bloggers and journalists (who actually never tried what they wrote about) it is assumed that you already have installed CWM. It seems to be needed also for other ROM's for the **EU Samsung Galaxy Tab 7"inch (GT-P1000)**, not only the one that I want to install. The actual problem is: When I try to install CWM **with ROM Manager** (5.0.0.6) **it *only* shows** the **two** models "Samsung Epic4G" and "Samsung GalaxyS i9000" in the list and not my model (Galaxy Tab EU) or any other model. When I researched I only found **outdated** YouTube videos and XDA-developer threads that don't provide a link to a newer / the most current solution. Most of all, **I had a hard time coming up with *any* Google search results that provide a *current* solution** for my issue. I am willing to try anything to get CWM up and running, as long as the process is outlined somewhere more or less understandable. Finally: I am aware that I void the warranty I never had. I did win my Galaxy Tab, thus never paid for it and never got a receipt and now live in another country anyways.