You can upgrade your existing 22.214.171.124 environment directly to 126.96.36.199. Simply download and run the 188.8.131.52 Patchset Installer.
However, I highly recommend you to look in to 11gR2 Forms (184.108.40.206). For two reasons:
1.) 220.127.116.11 (11gR1) Forms Support Timeline is shorter than 11gR2 Forms.
2.) 18.104.22.168 has caused a lots of problems for our Oracle Forms customers at runtime - you'll have to install opatch after opatch to fix various issues. If you don't have a preference for 11gR1 Forms vs 11gR2 Forms, I recommend you to go to 11gR2 (22.214.171.124). The 11gR2 runtime is much more stable.
Posting our step-by-step installation guide on here would be difficult, as its roughly 95 pages long. However, contact me through our website and I can help you out: http://pitss.com/us/services-solutions/oracle-fusion-middleware-infrastructure-architecture/