Explorer,

its a easy process if you satisfy the requirements. In order to qualify for Eb-2 advanced degree category, you must either have master's degree in related field or foreign equivalent plus some experiences or 4 years Bachelor's degree in related field with 5 years progressive expereience in related occupation offered, (expereince obtained after completion of Bachelor's degree and has to be in progressive in nature). If you have 3 years Bachelor's and 2 years masters (education systems in Nepal or India other than engineering degree which are usually 4 years), then case can be complicated in EB-2 category as different Service center adjudicate such cases in case by case basis -- which means it can be approved or it may not be approved as degree doesnt have 6 years schooling as required for Masters. Make sure when attorney files PERM labor certification, 3+2 master's is defined correctly in labor application so that USCIS will approve it under EB2. You do not necessarily have to have US Master's degree to be qualify for EB2, foriegn nationals can have foriegn degree but degree must be equivalent to US Master's or Bachalor's plus 5 years progressive exp.

Let me know if its helps, if not i can provide more information on this category. Whats your visa status, its better to file green card from H1B then F-1 as h1b is for Dual intent but F-1 is just a non-immigrant visa category.