Converting from txt to gct?

[ipwnuuaal5]

Basically I need help on a function that converts a text file into a gct file.

Here is the text in textfile that i want to convert into gct file:

00907A6D 0000003D
00907A6E 00000001
00907A6F 0000003E
00907A70 00000001
00907A71 000000A0
00907A72 000000A1
00907A73 000000B0
00907A74 00000066
00907A75 00000000

When i make this into a gct file and decode it with hex editor I get this:
As you can see the only addition code added is:
00D0C0DE00D0C0DE (at the beginning)
and
F000000000000000 (at the end)

File Downloads (both txt file and gct file):
Files.zip

Is it possible to create a txt to gct converter in vb.net?
If so, how?