We have existing GRC 5.3 SP10 with business process like finance, basis etc. Now if I want to implement another business process(e.g. MM module) delivered by other organisation to my existing GRC . How can this new module be merged/added? Is there any easy way? e.g. a) download existing rule - add new module to it - upload full
Yes, exactly as you suggest. The Rule Upload utility in the Configuration Tab allows you to upload individual elements of the ruleset or you can use the Rule Architect Impoert / Export facility to do it as a complete file.
Remember though that if you upload a ruleset, you will OVERWRITE the existing one so be careful to ensure that you have appropriate backups and test in pre-production first!