One of my first ROM flashes, could you please double check? topic

Wow, what a ride I had with this phone.
Starting with the fact that the model of the phone was SGH-I747 with AT&T branding :D I then tried to flash a custom rom based for this model, of course everything went bad, we'll not everything, but I couldn't make any calls, see IMEI nubmer and so on.

Thanks to a very helping member of SGH-I747 board, audit13, I found out that my phone is in fact T-Mobile's SHG-T999. I was lucky enough and was able to restore stock ROM of this model.

Now everything works, but since I'm located in Europe I would like to flash stock ROM without all the T-Mobile useless (since I don't have this carrier in my country) apps.

I found this ROM, which seems to be the one best used to get as close to stock android as possible - http://forum.xda-developers.com/show....php?t=2501303

And I just wanted to make sure that I don't miss anything important.

Phone Data
Model: SGH-T999
Bootloader version: T999UVUENC2
Android Version: 4.3
I've rooted the phone using this guide - http://forum.xda-developers.com/show....php?t=1771687 and using March 2014 - 4.3 JellyBean.

Could someone please explain difference between -StockMOD Custom ROM- and -StockMOD ROM-, I understand that -StockMOD ROM- is completely based on Stock ROM, little to no changes. But how little are these changes, will I have all the T-Mobile apps?

Steps I'm planning to make
1. Backing up efs folder by copying it with Root Browser to SD card and then on my PC.
2. Installing Clockwork MOD and Flashing ClockworkMod Recovery option
3. Creating backup of current ROM with ClockworkMod
4. Downloading StockMOD Custom ROM 4.3 RLS2.1.zip from the thread mentioned above (I'm a bit worried that file name in the thread is different - StockMOD Custom ROM T999 4.3 RLS2.1.zip)
5. Unfortunately I don't see link to T999UVUEMJC modem anywhere.
6. Copying of ROM file and Modem file to SD card (Is it ok if my SD card is only 2GB? ROM is a bit over 1GB).
7. Rebooting into recovery from ClockworkMod
8. Selecting Wipe data/factory reset
9. Selecting Wipe Cache partition
10. Going to advanced and selecting Wipe davlink cache
11. Selecting Mounts and Storage and format /system
12. Installing modem zip (If I can find it)
13. Installing StockMOD Custom ROM 4.3 RLS2.1.zip (is it ok to have spaces in file name?)
14. Praying to god everythings works :D