how to increase the maximum sms messaging for xperia x10 mini pro

[#1]

Please help me on how to increase the maximum sms messaging as after typing in and consuming 1st page for the text message, it will automatically have the mms settings which will not work for me. Also accessibility settings is grayed out and cannot be chosen.. I cannot get the sms settings through opening the message icon and click left navigation key. Please help. Thanks

[#2]

can i do the upgrade myself by visiting such site?

[gwhispererz]

I don't have an answer for you.

Visit the site, do some reading (to understand the process) and watch some related YouTube videos. Once you feel  confident enough, proceed with the plan.