The Stage Roster Expansion code doesn't change your stage select screen on it's own. After applying the Stage Roster Expansion code, you'll need to add the stages to your stage select screen using the Custom Stage Select Screen code
This one's already filled out - it should add the additional ten stages to the end of the Melee stage select screen. They'll be alternating between FD and Battlefield icons.
Custom SSS [Phantom Wings, spunit22]:
046B8F5C 7C802378
046B8F64 7C6300AE
040AF618 5460083C
040AF68C 38840002
040AF6AC 5463083C
040AF6C0 88030001
040AF6E8 3860FFFF
040AF59C 3860000C
060B91C8 00000018
BFA10014 7CDF3378
7CBE2B78 7C7D1B78
2D05FFFF 418A0014
006B929C 0000001F
066B99D8 0000001F
00010203 04050709
080A0B0C 0D0E0F10
11141516 1A191217
0618131D 1E1B1C00
006B92A4 00000013
066B9A58 00000013
1F202122 25242326
27282A2B 2C2D2E2F
30313200 00000000
06407AAC 00000066
01010202 03030404
05050606 07070808
0909330A 0B0B0C0C
0D0D0E0E 130F1410
15111612 17131814
19151C16 1D171E18
1F19201A 211B221C
231D241E 251F2932
2A332B34 2C352D36
2F373038 3139323A
2E3BFFFF 40024101
42024301 44024501
46024701 48020000
You may also need this code if you want the stages to appear when you select random.
Enable Random Exp. Stages v1.1:
C26B7A6C 00000005
3860001F 2C120000
41820008 3860000A
7C101800 41800008
38000001 7C800379
60000000 00000000