Problems with installing Catalyst Control Center

Hey,

I own a Dell Studio 1535 with an Ati Mobility Radeon 3450 and Windows Vista 32.

I made a faulty installation of ATI's Catalyst Control Center a while back, and have been unable to use CCC since then. In addition, I've been getting a "Could not load file assembly Cli.Implementation..." error message on startup, which also pops up everytime I try to run CCC through Vista. I followed Crossfire's advice in this ,thread which reads as follows:
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Following error message appears after installing Catalyst 7.2 and launching Catalyst Control Center
Could not load file or assembly 'CLI.Implementation, Version=2.0.2589.34531, Culture=neutral, PublicKey Token=90ba9c70f846762e' or one of its dependencies. The system cannot find the file specified


If you experience this issue, please try the following steps to resolve. If the steps do not resolve the issue, please PM me.


This can happen if you uninstall / reinstall or do an upgrade of CCC, IF certain assembly files are not properly GAC’ed during install, or removed from the GAC during uninstall (.Net “global assembly cache”).


Uninstalling CCC, and then:


1. Check that (Program Files folder )/ATI Technologies/ATI.ACE is empty
2. Check (Windows folder)/Assembly folder to see if there's any files with Public Key Token of "90ba9c70f846762e" (Sort by Public key token to get a easier view). All these tokens should be uninstalled by right clicking and uninstalling.
3. Check that (Document and Settings)/(User)/AppData/Local/ATI/ACE is empty
4. Reinstall CCC


OK I have received feedback that these steps dont work.

Please try the following and let me know. If you delete the wrong registery key, that is your problem. Please be diligent and backup your registery before completing these steps. If you are unsure, then the registery is not the place for you to be.
1. Check that registry locations are empty:
a. HKCU/Software/ATI/ACE
b. HKLM/Software/ATI/ACE
2. Check that (Program Files folder )/ATI Technologies/ATI.ACE is empty
3. Check (Windows folder)/Assembly folder to see if there's any files with Public Key Token of "90ba9c70f846762e" (Sort by Public key token to get a easier view). All these tokens should be uninstalled by right clicking and uninstalling.
4. Check that (Document and Settings)/(User)/AppData/Local/ATI/ACE is empty
5. Reinstall CCC
>

Following this, I managed to get rid of the error and I think CCC was fully removed from my computer as well. However, when I downloaded the CCC setup file, ATI Install Manager doesnt seem to see it. It only offers me the option of installing the ATI Display Driver and other stuff without allowing me to install Catalyst Command Center.

Could someone tell me what I could do? Is there any way I can manually install CCC without going through the ATI Install Manager? Or what other steps should I take short of a full system restore which I cant afford right now because of too much unsaveable data.