* The two 'e's in the first word have different ciphertext equivalents, so it's not a single-alphabet substitution yes
Could be homophonic substitution or possibly (more probably, in my estimation, polygram substitution. There is also the possibility of a polyalphabetic cipher...
I also likes "follows": "vkbcjtp" note how ll gets translated to "bc". That suggest that after some encryption of each letter from the plaintext there is a consecutively increasing number added.
This tends to suggest polyalphabetic substitution. Datacomms Technologies web authoring and data security Paul Bradley, Paul@fatmans.demon.co.uk Paul@crypto.uk.eu.org, Paul@cryptography.uk.eu.org Http://www.cryptography.home.ml.org/ Email for PGP public key, ID: 5BBFAEB1 "Don`t forget to mount a scratch monkey"