GB is Gingerbread (Android 2.3)
ICS is Ice Cream Sandwich (Android 4.0)
MTD and non MTD refers to the partition table. ICS ROMs (CM9 and AOKP just to name a few), after April 2012, uses open standard partition table called MTD. To return to stock Samsung (non MTD alias BML) partition table, a pit file is a must, repartition checked.
First, don't just stick any pit file not made for your device. It will brick your device.
(what is that s1_odin_20100803.pit, don't tell me it is Galaxy S pit file... because I don't know what is it going to do with your tab internal memory)
BTW, why do you want to specifically flash this ROM file you have?
Have you tried Overcome GB-Stock-Safe-v5 from Overcome guide?
Go to overcome site
Read the guide,
Missing pictures can be seen here.
Follow the picture step by step.
Basically to restock:
Download GB-stock-safe-v5.zip, unzip it and and flash with ODIN according to the guide.
Stop there and you will have Gingerbread JQ1
You can continue with the rest, and you will get Overcome 4.1 and you won't regret.
From there you can then try AOKP or CM9, all requires you to have Overcome Kernel with its CWM recovery to flash.