Dont worry about securom. If you are comfortable with coding IAT fixers, it shouldnt be a problem. There is a trick with .text decryption, but its very easy, even Pedro's tutorial tells you how to get past it

Securom 7+ on the other hand... They say it is a total recode, but I can't say anything for sure since I have yet to gather enough money to buy a Securom 7 game