Installation of ROMs is very simple..
1. Boot into your ClockWorkMod recovery
2. Select Backups & Restore (Make a backup before you change ANYTHING)
3. Return back to the main screen.
4. Do your wipes! (Data/cache/dalvik)
5. Install from sdcard (navigate to where you have a custom ROM placed on your sdcard) and follow the prompts to install.
6. Reboot from the Main screen when done into your new custom ROM!
Aside from that, removal of bloatware or apps is entirely up to you.
I suggest using an application like Titanium Backup or My Backup Root from the Google Play Store (Free versions) which has plenty of options...
1. Freeze/Unfreeze apps (this way you can experiment and not have to remove the app)
2. Backup or Restore an application & data associated with that app.
3. Delete an application