Upgrade your standard SINS to version 1.13 once done copy the hole folder and put it say on your desktop.
Then rename you original sins to what ever you want. I for one just added 1.13 at the end.
Then move your copy folder in the same directory as the 1.13 one.
Restart impulse, it should detect only 1 copy of sins maybe 2. If it detects only one you good just upgrade it to beta and once done restart impulse it should then see 3 copies of sins one original and one entrenchment.
If impulse detects 2 sins copied ta first then it's a case of russian rollet on witch copy you will instal beta on.
Once done you will want to preperly relink your shortcuts to running both versions of sins.
