Software to change field names within flevel.lgp file?

[Shademp]

Unable to search for related topic.
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Waiting a short while has not worked. =/

The desire is to change the following field names in the PC version back to their PSX counterpart.
PC -> PSX
qa -> q_1
qb -> q_2
qc -> q_3
qd -> q_4
qe -> q_5
min71 -> 7min1
sbwy4_1 -> 4sbwy_1
sbwy4_2 -> 4sbwy_2
sbwy4_22 -> 4sbwy_22
sbwy4_3 -> 4sbwy_3
sbwy4_4 -> 4sbwy_4
sbwy4_5 -> 4sbwy_5
sbwy4_6 -> 4sbwy_6
min51_1 -> 5min1_1
min51_2 -> 5min1_2
tower5 -> 5tower

I am unable to find a field-name-edit function in Makou Reactor. Anybody know existing software or methods to change the field names?

 

[gjoerulv]

Extract them, rename them, repack them. There should be some archive extractors somewhere.
I was gonna make one, but I found it redundant.
Besides, can't MR do it?

 

[Vehek]

The file "maplist" (inside flevel.lgp) also needs to be edited. It contains the map names.