appointment plugin for buss ticket booking purpose

I want to use appointment plugin for bus ticket booking purpose.

I want to do following modification:

1. At the moment,

http://mero.co/bus-ticket-booking/

in this page, beside this calender, when being selected the date, 3 column of time appears.

I want to have either 2 column or, 4 columns.

2. At the moment, the time appears, lets say "8.00 am" , "8.30 am" etc..

I want to have either 2 column or, 4 column.

Like arrangement of bus seat, I want to have seat name as A1, A2, A3,,, .... B1, B2, B3...

2 column of seat in "A" and 2 column of seat in "B".

And in the column, in stead of "8.00 am = 1,
Please help me. which file should I modify?

Looking forwards for your help.

Jay K Thakur