How to update IFS Apps 10 from UPD 10 to UPD 21 Manually without IFS help

Hi,

We as a partner are updating IFS application from UPD 10 to UPD 22 for our client. We would like to know the steps involved to do this update manually without the help of IFS.

As a start we have followed the steps.

1. Created IFS Case and apply UPD 22 and created customization package.
2. Requested ifs for the latest config file and they gave us with UPD22 updated config file
3. We have created build home by running IFS Config builder.
4. Then we have downloaded the UPD extractor file from the customization package and opened this file in solution developer.
5. Now we are at the step to Make obsolete, Merge and Check in files to harvest. 

Can anyone please let us know if the steps followed till now are correct and is there a document or set of steps that need to be followed to do this update of IFS application manually.

Thank you

Regards,

Roshith Shetty